The Editor widget does not honor multipoint features.
Bug ID Number
April 1, 2015
December 1, 2020
Operating System Version
After review by the development team, it has been determined that this issue is related to a known limitation with the software that lies outside of Esri's control. The issue's Additional Information section may contain further explanation.
Not possible to edit new multipoint features using Editor, the code in sample shows, " “create_tool_multi_point". This is not possible. Vertices should be able to be modified.
Use the Draw toolbar to add multipoint fetaure service instead.